Plate for deadening vibration and sound.



W. GENEST & H. sTbssEL. PLATE FOR DEADENING VIBRATION AND SOUND.

APPLICATION FILED JULY 14, 1909.

Patented Sept 2?, 1910.

2 SHEETS-SHEET 1.

l/Vi/f ms:

w. GENEST & H. sTO'ssEL. PLATE FOR DEADENING VIBRATION AND SOUND. APPLICATION FILED JULY 14, 1909.

971,369. Patented Sept 27,1910.

2 SEBETSSHEET 2.

I v I I M0 45$ A. ggl 5r$afiM AUG/MEX UNITED STATES PATENT; OFFICE.

weaken-GENE, or 'oxoss-nionrnnrntnn, AND Hoeo sro'ssEL, or w'ssrmm,

GERMANY.

PLATE FOR DEADENIN VIBRATION AND SOUND.

Specification of Iletters Patent. Patented Sept. 27,19 10.

Application filed .iuly l't, 1909. .Scrial Ho. 567,664:

. Kingdom'of Prussia, German Empire, have invented newahd useful Improvements'in Plates for Deadening Vibration and Sound, of which thefollowing is a full, clear, and exact specification. a i V Our invention relates to cork sheets for deadening vibration and sound. 1

For preventing or deadening thev transmission of sound and vibration in machinery plants, railways, and the like, sheets of cork are used as insulation. The sheets are generally placed between the machine, engine or the like and its foundation, but they may also be arranged at thesides-of the machine or in anyother suitable position, according to the direction in which transmission that is to be prevented is likely to occur.- Such sheets are generally made of..'natural cork' cut into strips of suitable size and madeinto' sheets by joining a number of these strips together, the whole being confinedby an iron band or hoop around the periphery of the sheet. A sheet made up in this way is apt wlose its shape and to become less efiioient because the weight or pressure of the machine causes the cork to expand laterally and either ruptures or distorts the iron bandor hoop. Y v

Now a primary object of our invention is to provide acork sheet or plate which is stronger and more durable than those-known heretofore. This object is attained by providing in the sheet or plate a number of cross-ties or reinforcing bars; for instance the frame-work of the plate,instcad of being merely a confining hoop is a grid or grating the transverse bars of which act as ties for the surroun ing hoop or band.

Care must be taken that there is no metallie :oonductionbetween the foundation and the machine. The inserted bands or rods must thereforele hfless depth than-the thickness of the cork,

In order thatour invention may be clearly understood we .will-now explain the same with reference to the accompanying drawings in which one embodiment is represented by way of example.

In said drawings, Figure 1 is a plan, partly in horizontal section of a cork plate or sheet made according to our invention, Fig. 2 ls/fii sidev ew of the same, partlyin vertical/section; Fig. .3 is a side elevation of a metal strip inserted between the cork strips; Fig. 4 is a section of this strip, whereas'Fig. 5 is a section through a sheet made up of the separate strips, and Fig. 6-is a side elevation of two cork strips one of which is broken away.

Referring to the drawings, a is a hoo made of an iron band or the like provided with cross-ties or reinforcing bars 6 fornb' ing a grating and firmly connected with the hoop a, the bars 7) also being preferably made of iron bands or the like. The compartments so formed are filled with corkby cutting the natural cork into strips not suitable size and putting these strips, in the .manner shownin the drawings, into the compartments formed by the hoop a and bars 6. The cork strips are made of such thickness as to project above and below the hoop a and bars I) as shown in Fig. 2. Thus no metallic contact can 'take place between the foundation and the engine or the like placed on the cork plate. The cork strips being in immediate contact with, the inner bars 1; are preferably laterally cut-away, as shown in Fig. 2, so as to overla and cover the bars 7/ from above and rom below. These cork plates are preferably impregnated with some liquid which is not likely to dryunder the conditions in question in each instance. The reason for this is that when a cork plate not treated in this manner is used to insulate the foundation of a machine in a heated room, the cork in time loses some of its water and become brittle.

Apart from the fact that this afiects the leum, heavy petroleum or the like. The

.is made or the completed which quickly, and would thus 'npregnation'can be efieetedby dipping either the separate strips of which the. plate plate into a vessel has been filled with theimpreg liquid.

be effected at an increased tmperature'or even at increased or decreased pressure. Under general circumstances it is'sutlicient to immerse the cork in the liquid for a few hours without diminishing the pressure. It should be pointed out that m'any'sorts of tar, asphalt or the like which have been used as a binding medium for producing cork plates from residues, are not suitable for saturating'cork forthe purpose of this invention since they harden comparatively form a most unsuitable insulating material for deadening vibrations and noises. v

It [is fluid should also have antiseptic properties,

which is the case with most'of the liquids named; if the liquid is devoid of such prop erty an antiseptic may be separately used.

In order to prevent the separate cork strips from relative movement or from falling out, insertions may be arranged between the strips, friction between which-and the strips prevents a'elative movement. For instance, strips of sheet metal With-roughened surfaces may be used. The teeth or roughness'es enter the cork strips and so prevent them from shifting.

In Figs. 3, 4, 5 and 6, (Z are the teeth on the one side, ethose on the other side of the metal strip. Fig. 6 shows the strip bent twice at an angle so as to form a connection between the ends of two strips.

The form and number of the teeth depends entirely on the stress likely to cause the cork strips to shift. Instead of metal strips, bands or strips of other suitable material such as sandpaper sanded on both faces,

may be used.- WV hen metal or like strips are nating If necessary the impregnation can plurality teeth, placed 1b used, care must 'be taken that they are not as deep as the cork strips, in orderthat thus form a conductor for vibrations-and sounds. I

If desired the sheets may be perforated or may contain cavities to increase their elasticity. We claim 1. In a plate for deadening vibration and sound, the combination of a metal frame having transverse -reinforcing bars, and a plurality of vsheets of cork held ingsaid frame, eachsheet of cork comprising a plu rality of strips of cork and roughened insertioIns placed between the same.

2. 11 sound, the combination of a metal frame having transverse reinforcing bars, and a of sheets of cork held. in said frame, each sheet of cork comprisin a plurality of strips of cork and meta strips, provided with oppositely disposed spurs or etween the same.

In a plate for deadening vibration and sound, the'combination of a metal frame having transverse reinforcing bars,'and a of sheets of cork held in said rame, each sheet of cork comprising a plu rality of strips a plate for deadening vibration and a depth less than that of the cork strips and provided with oppositely disposed spurs or teeth, placed between the same.

In testimony, that we claim the foregoing as our invention, we have signed ournames in presence of two subscribing witnesses.

WERNER GEN EST. HUGO 'STUSSEL. Witnesses WoLnnMAn HAUr'r, HENRY Hssrnn. 

